Permissive hypercapnia for severe acute respiratory distress syndrome in immunocompromised children: A single center experience.

PLoS One · 2017 · PMC5478142 · PMID 28632754

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However, patient data including a severity of illness score and parameters of gas exchange showed a trend towards more severe lung disease in the latter cohort.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.